LQG Servo Controller for the Current Control of $LCL$ Grid-Connected Voltage-Source Converters

Huerta, F.; Pizarro, Daniel; Cobreces, Santiago; Rodríguez, Francisco; Giron, C.; Rodrı́guez, Ana

doi:10.1109/tie.2011.2179273

Cited by 122 publications

(86 citation statements)

References 27 publications

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“…This control scheme is valid for both linear time-invariant systems as well as for linear time-varying systems. LQG control technique facilitates the designing of a linear feedback controller for an uncertain nonlinear control system [79][80][81]. An LQG control structure with a Kalman estimator is shown in Figure 24.…”

Section: Lqg Control Techniquementioning

confidence: 99%

Digital Control Techniques Based on Voltage Source Inverters in Renewable Energy Applications: A Review

et al. 2018

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Abstract:In the modern era, distributed generation is considered as an alternative source for power generation. Especially, need of the time is to provide the three-phase loads with smooth sinusoidal voltages having fixed frequency and amplitude. A common solution is the integration of power electronics converters in the systems for connecting distributed generation systems to the stand-alone loads. Thus, the presence of suitable control techniques, in the power electronic converters, for robust stability, abrupt response, optimal tracking ability and error eradication are inevitable. A comprehensive review based on design, analysis, validation of the most suitable digital control techniques and the options available for the researchers for improving the power quality is presented in this paper with their pros and cons. Comparisons based on the cost, schemes, performance, modulation techniques and coordinates system are also presented. Finally, the paper describes the performance evaluation of the control schemes on a voltage source inverter (VSI) and proposes the different aspects to be considered for selecting a power electronics inverter topology, reference frames, filters, as well as control strategy.

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Section: Lqg Control Techniquementioning

confidence: 99%

Digital Control Techniques Based on Voltage Source Inverters in Renewable Energy Applications: A Review

et al. 2018

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“…In total, there are 18 kinds of state feedback as shown in (6) where P, I and D stand for proportional, integral and derivative feedback, respectively. The number of states participating in the pole-placement can be 2, 3 or 4 [42][43][44][45][46][47][48][49].…”

Section: Pole-placement Strategymentioning

confidence: 99%

“…For the pole-placement design in the z-domain, another way is to take account the control delay by introducing an extra state. For instance, considering that the control delay appears as z -1 , the inverter output voltage was included in the state vector [44][45][46][47][48], and several parameter design methods for full state feedback control were proposed in [45,46,48]. Table 3 gives a general overview of the existing multistate feedback strategies.…”

Section: Multi-state Feedback Control Based On Poleplacementmentioning

confidence: 99%

“…Pole-placement based multi-state feedback is robust because of the full controllability of the inverter dynamics, as analyzed in [44,46,50]. However, for zero-placement based multi-state feedback, the weights f 1 (s) and f 2-(s) closely relate to the filter parameters.…”

Section: Multi-state Feedback Admentioning

confidence: 99%

“…Filter-based AD improves stability by adding a digital filter next to the current controller [11][12][13][14][15][16]. For feedbackbased AD, the state used for feedback can be the capacitor current [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], the capacitor voltage [33][34][35][36], the inverterside current [37], the grid current [38][39][40][41] or a combination of multiple states [42][43][44][45][46][47][48][49][50]. Among the feedback-based AD methods, proportional feedback of capacitor current is widely studied during last decade due to its simple implementation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

LCL-resonance damping strategies for grid-connected inverters with LCL filters: a comprehensive review

Xie

2017

J. Mod. Power Syst. Clean Energy

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Grid-connected LCL-filtered inverters are commonly used for distributed power generators. The LCL resonance should be treated properly. Recently, many strategies have been used to damp the resonance, but the relationships between different damping strategies have not been thoroughly investigated. Thus, this study analyses the essential mechanisms of LCL-resonance damping and reviews state-of-the-art resonance damping strategies. Existing resonance damping strategies are classified into those with single-state and multi-state feedback. Singlestate feedback strategies damp the LCL resonance using feedback of a voltage or current state at the resonance frequency. Multi-state feedback strategies are summarized as zero-placement and pole-placement strategies, where the zero-placement strategy configures the zeros of a novel state combined by multi-state feedback, while the poleplacement strategy aims to assign the closed-loop poles freely. Based on these mechanisms, an investigation of single-state and multi-state feedback is presented, including detailed comparisons of the existing strategies. Finally, some future research directions that can improve LCL-filtered inverter performance and minimize their implementation costs are summarized.

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Control of distributed generation systems for microgrid applications: A technological review

Arfeen

Khairuddin

Larik

et al. 2019

Int Trans Electr Energ Syst

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Summary Microgrid implementation requires effective and efficient strategies for controlling the grid parameters. Various problems are encountered with the deployment of distributed generation in terms of reverse power, an imbalance between power generation and nonlinear load. This paper is focused on the existing controllers in terms of their merits and limitations. Furthermore, the state of the art of the local power distribution system especially on renewable energy resources along with energy storage methods is explored. Reliability and stability of power flow between sources and consumers via voltage source inverter are also considered. The emerging microgrid concept in islanding and grid‐connected mode using different controller along with soft computing algorithm are presented. This paper gives the reader fast insight into the context of the controller and its application.

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LQG Servo Controller for the Current Control of $LCL$ Grid-Connected Voltage-Source Converters

Cited by 122 publications

References 27 publications

Digital Control Techniques Based on Voltage Source Inverters in Renewable Energy Applications: A Review

Digital Control Techniques Based on Voltage Source Inverters in Renewable Energy Applications: A Review

LCL-resonance damping strategies for grid-connected inverters with LCL filters: a comprehensive review

Control of distributed generation systems for microgrid applications: A technological review

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